ALEXANDRIA, Va., March 31 -- United States Patent no. 12,591,849, issued on March 31, was assigned to Express Scripts Strategic Development Inc. (St. Louis).

"Methods and systems for unit of use product inventory" was invented by Charles E. Eller (Prescott, Ariz.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Method and systems for product inventory are described. In one embodiment, an inventory surface unit retains a plurality of products in an unordered state. An inventory identification unit acquires information for an orientation, and location of the plurality of products on the inventory surface unit. The inventory identification unit is disposed above the inventory surface unit. An inventory pick unit ...